题目内容：

31.Always acting in a strange way,he must have __ to people around to be mad.0分
A shown
B imagined
C thought
D appeared
求每个选项的详解 thanks

优质解答

appear to be表示给人什么印象.
show是“显示”的意思,不过后面不能接不定式“to be mad”;
imagined意思是想象,不合题意.
thought是认为,这里明显意思不对,要么就写成别人认为他疯了,主语不应该是he.

追问：

appear to be 具体怎么用 给个例子 show 又是怎么用的

追答：

例句： She appeared to be in her late thirties. 她看起来三十多岁。 They appeared not to know what was happening. 貌似他们并不知道发生了什么。 There appears to have been a mistake. 似乎有一个错误。 show有展现的意思：比如Show some respect, please!（请放尊重点！）